Search for the second forbidden beta decay of 8B to the ground state of 8Be

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dc.creatorBacrania, M. K.
dc.creatorBoyd, N. M.
dc.creatorRobertson, R. G. H.
dc.creatorStorm, D. W.
dc.date2007-10-28
dc.date2007-12-07
dc.date.accessioned2026-07-07T11:12:41Z
dc.date.available2026-07-07T11:12:41Z
dc.descriptionA significant decay branch of 8B to the ground state of 8Be would extend the solar neutrino spectrum to higher energies than anticipated in the standard solar models. These high-energy neutrinos would affect current neutrino oscillation results and also would be a background to measurements of the hep process. We have measured the delayed alpha particles from the decay of 8B, with the goal of observing the two 46-keV alpha particles arising from the ground-state decay. The 8B was produced using an in-flight radioactive beam technique. It was implanted in a silicon PIN-diode detector that was capable of identifying the alpha-particles from the 8Be ground state. From this measurement we find an upper limit (at 90% confidence level) of 7.3 x 10^{-5} for the branching ratio to the ground state. In addition to describing this measurement, we present a theoretical calculation for this branching ratio.
dc.descriptionOne reference corrected. Minor edits in text
dc.identifierhttps://arxiv.org/abs/0710.5197
dc.identifierhttp://arxiv.org/abs/0710.5197
dc.identifierPhys.Rev.C76:055806,2007
dc.identifierdoi:10.1103/PhysRevC.76.055806
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191464
dc.subjectNuclear Experiment
dc.titleSearch for the second forbidden beta decay of 8B to the ground state of 8Be
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